Combination boiler and furnace.



No. 862,067. PATENTED JULY 3-0, 1907.

v N. FROST. COMBINATION BOILER AND FURNACE.

APPLICATION FILED AP R.'22.1907.

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UNITED STATES PATENT orrrcn.

COMBINATION BOILER AND FURNACE.

Specification of Letters Patent.

Patented July 30, 1907.

Application filed April 22,1907. Serial No. 369,549.

To all whom it may concern:

Be it known that I, N ATHANIEL Fnos'r, a citizen of the United States,and a resident of Bloomington, in the county of McLean and State ofIllinois, have invented a new and Improved Combination Boiler andFurnace, of which the following is a full, clear, and eXact description.

The invention relates to heating apparatus having a steam boilerarranged within a furnace and both located within a Warm air chamber,thus utilizing the generated heat for hot air heating and ventilatingpurposes as Well as for direct or indirect steam heating purposes.

The object of the invention is to provide a new and improved combinationboiler and furnace, which is simple and durable in construction veryeffective in operation and arranged to utilize the heat generated by theburning fuel to the fullest advantage.

The invention consists of novel features and parts and combinations ofthe same, which will be more fully described hereinafter and thenpointed out in the claims.

A practical embodiment of the invention is represented in theaccompanying drawings forming a part of this specification, in whichsimilar characters of reference indicate corresponding parts in all theviews.

Figure l is a longitudinal sectional elevation of the furnace andboiler, the section being on the line 1-1 of Fig. 2; Fig. 2 is atransverse section of the same on the line 22 of Fig. 1 and showing thefurnace and boiler within the hot air chamber, and Fig. 3 is a frontelevation of the furnace and boiler.

As illustrated in Fig. 2, the metallic furnace casing A containing thereturn flue boiler B is arranged within a suitable air chamber 0 ofbrick, metal orother material, and in which air for heating orventilating purposes is heated by the heat radiating from the furnacecasing A. Within the front lower portion of the furnace casing A isarranged a fire-box D having a grate E, below which is the ash pit F,suitable doors D and F being provided at the front A of the furnacecasing, to permit of gaining access to the fire-box D and the ash pit Ffor the introduction of fuel and the removal of ashes, respectively.

As indicated in Figs. 1 and 2 the pot of the fire-box D as Well as thegrate E are supported on suitable brackets A arranged in the furnacecasing A. The upper portion of the furnace casing A is provided at thesides with longitudinally extending shelves A forming with the sides ofthe boiler B a tight joint, especially upon calking the adjacentsurfaces of the shelves A and the boiler B. Supporting brackets Gattached to the shell of the boiler B rest on' the shelves A so as tosuspend the return flue boiler B within the Casing A, as plainlyindicated in Figs. 1 and 2. A transverse partition H extends between therear end A of the furnace casing A and the rear head of the boiler B adistance above the return flues thereof, and a partition I extendsbetween the front A of the furnace casing A and the lower portion of thereturn flue boiler B, the said partition I being preferably acontinuation of the lower portion of the shell of the boiler B, and thesaid partition I is preferably provided at the under side with aprotecting covering I, so as to protect the partition I from the heatemanating from the burning fuel in the fire-box D located immediatelybelow the partition I.

Now by the arrangement described, the return flue boiler B is suspendedin such'a manner within the furnace casing A that the lower portion ofthe boiler is a distance above the bottom of the furnace casing A, to

form a combustion chamber J, connecting at the front end with thefire-box D and at the rear end with a chamber .I formed by the partitionH and portions of the rear ends of the furnace casing A and the boilerB, so that the smoke and gases passing from the combustion chamber .linto the rear chamber J are directed into the boiler fines, to travelforward therein and to pass into the front chamber J 2 formed by thepartition I, a portion of the front A and the front of the boiler B, asplainly indicated in Fig. 1. The open top of the chamber J 2 connectswith the top chamber J extending above the boiler B and formed bytheshclves A the top of the boiler Bland the top of the furnace casingA, and the rear .end of this top chamber J leads to an outlet Kconnected with the chimney, so as to conduct the smoke and gases fromthe top chamber J to the chimney.

The feed water pipe L leads into the bottom of the boiler B, as plainlyindicated in Fig. 1, and from the top of the boiler B and from near themiddle thereof extends the steam pipe N in a forward direction, andpassing through the front A of the boiler, to be then connected withmachinery or heating apparatus to be fed with live steam. The outer endof the steam pipe N is connected with the usual water gage and steamgage device 0, as illustrated in Fig. 3.

The rear lower portion of the furnace casing A is supported by suitablejack screws P to hold the furnace casing and the boiler B therein in alevel position.

"he front A of the furnace casing A is provided with doors Q, forgaining access to the front chamber J 2 and the smoke flues of theboiler B, for cleaning the same Whenever it is desired to do so, andsmall doors B are arranged in the front A of the furnace casing Aopposite the top chamberJ for gaining access to the latter and to thetop of the boiler B.

The sides A of the furnace casing A are preferably corrugated, asindicated in Fig. 2, to give the desired strength to the furnace casingand to provide a large heating surface, and to compensate for expansionand contraction.

i The heater shown and described is very simple and durable inconstruction, and is arranged'to utilize the heat generated by theburning fuel in the fire-box D heated air can be readily used forheating and ventilating purposes.

Having thus described my invention I claim as new and desire to secureby Letters Patent:

1. A heater comprising a furnace casing provided on its sides withlongitudinally extending shelves, a return flue boiler forming with itssides a tight joint with the said shelves, to divide the casing into anupper and lower smoke chamber, the said boiler terminating at its ends adistance from the ends of the said shell, means for supporting theboiler from the shelves, and front and rear transverse partitions, ofwhich the front partition extends from the front lower portion of theboiler to the front of the furnace casing, and the rear partitionextends from the rear end of the furnace casing to the rear end of theboiler at a point above the boiler fines.

2. A heater comprising a furnace casing provided on its sides withlongitudinally extending shelves, a return flue boiler forming with itssides a tight joint with ,the said shelves, to divide the casingiinto anupper and lower smoke chamber, the said boiler terminating at its ends adistance from the ends of the said shell, means for supporting theboiler from the shelves, front and rear transverse partitions, of whichthe front partition extends from the front lower portion of the boilerto the front of the furnace casing, and the rear partition extends fromthe rear end of the boiler at a point above the boiler flnes, and aprotecting covering on the underside of the said front partition.

3. A heater comprising a furnace casing provided on its sides withlongitudinally extending shelves, a return'flue boiler forming with itssides a tight joint with the shelves, to divide the easing into an upperand lower smoke chamber, the said boiler terminating at its ends adistance from the ends of the said shell, means for supporting theboiler from the shelves, and front and rear transverse partitions, ofwhich the front partition extends from the front lower portion of theboiler to the front of the furnace forward and coming out through thefurnace front;

casing, and the rear partition extends from the rear end of the furnacecasing to the rear end of the boiler at a point above the boiler fines,the said front partition forming an integral extension of the boilershell and terminating at its sides at the said shelves.

i. The combination of an air chamber, a furnace en tirely within the airchamber, a return flue boiler entirely within the furnace, and with anoutlet steam pipe taken off of the top of the boiler at about its centerand passing the hot gases and smoke traveling from the point ofgeneration to the rear of the furnace, thence forward entirely throughthe boiler tubes, 'and then over the top of the boiler but within thetop covering of the furnace to the roar of the same, substantially asset forth.

5. The combination of an air chamber containing therein a furnace withmetallic firebox sides with inwardly projecting shelf with supportingbrackets used as bearings supporting a tubular boiler arranged entirelywithin the furnace, said furnace having an arched metallic to'pcovering, and all so arranged that the smoke and hot gases may travel tothe rear of the furnace, then forward to the front of the furnace andthen over the top of the boilerand within the furnace to the rear of thefurnace, substantially as set forth.

G. The combination of an air chamber, containing therein a furnacewithin which is a horizontal return flue boiler enough shorter than thefurnace to form a chamber at each end when it is suspended over thefire, and being hung by brackets attached to the boiler and havingbearings on a shelf, which shelf and supporting brackets are integralwith the corrugated sectional fire-box sides, which shelf so projectsinwardly, that the inner edge of the shelf may so nearly touch the sidesof the boiler that by calking a tight joint may be made, said boilerhaving at its forward end a front. flange extending forward to thefurnace front, and describing so much of a circle as is required toreach the inner edge of the shelf on each side, thus dividing theinterior of the furnace into a lower cham her and an upper chamber withconnecting chambers at each end substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

NATHANIEL FROST.

Witnesses GUY W. Hannr, Lnnor G. WHITMER.

